Merging Pyramix User Manual page 497

TDIF
Output
TDIF
Reference
Selects the input used as the clock reference when Pyramix sync is set to Audio Input. When set to AUTO, Pyramix
searches through the inputs and locks to the first valid source it finds.
The drop-down list offers the following choice of Clock reference sources:
AUTO
TDIF Front
TDIF Rear0
TDIF Rear1
When set to AUTO, Pyramix searches through all the inputs in ascending order and locks to the first valid source it
finds.
Settings : I/O Interfaces 27 - 497